Benelli 750 sei

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Re: Benelli 750 sei

Postby John H » Thu Jul 23, 2020 10:13 pm

Mark, Has all those rare parts arrived yet?
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Re: Benelli 750 sei

Postby Lotus54 » Fri Jul 24, 2020 12:39 am

Yes, everything ive ordered has gotten here, I’ve been finishing up other jobs/projects- then start on engine.
1976 OSSA Super Pioneer- 78 Benelli 750 sei,72 250 2C Benelli, 68 Benelli Dynamo trail, 76 OSSA GPII Phantom, Beta XTrainer 300, Lotus Elan S3
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Re: Benelli 750 sei

Postby John H » Mon Sep 07, 2020 10:18 am

How is the 750 sei coming? Projects are backing up here but I guess that's what winter is for. Still gathering parts for different projects that l hopefully get to.
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Re: Benelli 750 sei

Postby Lotus54 » Mon Sep 07, 2020 10:33 am

I have done nothing! Too much other stuff going on and not the time to really dig in.
   I really need to finish stripping the frame, then I can use the other lift for stuff.
I like using my ‘main’ lift for working on the engine, since it is big, well lit and can set at just the right height for working.

Making a ‘Guinness knock-off’ today.
1976 OSSA Super Pioneer- 78 Benelli 750 sei,72 250 2C Benelli, 68 Benelli Dynamo trail, 76 OSSA GPII Phantom, Beta XTrainer 300, Lotus Elan S3
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Re: Benelli 750 sei

Postby John H » Tue Sep 08, 2020 8:06 pm

Hmmmm, Haven't had a good black and tan for a long time.
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Re: Benelli 750 sei

Postby Lotus54 » Thu Nov 05, 2020 1:54 pm

I managed to get a bit of time to work on the big Benelli (I got a darn cold too- slowed me down).
I stripped the rest off the frame, just need to take off swingarm now.

Next I’ll sand or sandblast the frame before painting (might powder-coat, but probably paint).

Still have things to finish before diving into re-assembling the engine.
1976 OSSA Super Pioneer- 78 Benelli 750 sei,72 250 2C Benelli, 68 Benelli Dynamo trail, 76 OSSA GPII Phantom, Beta XTrainer 300, Lotus Elan S3
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Re: Benelli 750 sei

Postby John H » Fri Nov 06, 2020 4:38 pm

Been wondering how the project was moving along. Other things have a habit if getting in the way for sure .
Assembling that motor will definitely demand full concentration. I have a portable sandblaster you are welcome to use.
Actually, two of them. One is a siphon type and the other is a Harbor Freight pressure pot.
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Re: Benelli 750 sei

Postby Lotus54 » Fri Nov 06, 2020 7:54 pm

Thanks
I have a portable sandblaster (gave away my cabinet and got a vaporhoner).

Yes, I want lots of time and room for the engine. It is pretty straightforward, but I want to keep focused on it when I start.
I have not gone through the head yet either.

Of course, I may go riding tomorrow instead of working. Haha
1976 OSSA Super Pioneer- 78 Benelli 750 sei,72 250 2C Benelli, 68 Benelli Dynamo trail, 76 OSSA GPII Phantom, Beta XTrainer 300, Lotus Elan S3
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Re: Benelli 750 sei

Postby Lotus54 » Mon Dec 28, 2020 7:07 am

The head is all apart and I’m cleaning carbon. After cleaning well, valves look quite good, guides have very little play.
I’ll check, but I think I can just lap the valves.
Still loads more cleaning to do. (It is pretty messy)
I think I’ll try to get the head done before I start with the bottom end. It is a lot easier to deal with size wise and I can use another work bench. For the bottom end, I’ll use my lift.
1976 OSSA Super Pioneer- 78 Benelli 750 sei,72 250 2C Benelli, 68 Benelli Dynamo trail, 76 OSSA GPII Phantom, Beta XTrainer 300, Lotus Elan S3
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Re: Benelli 750 sei

Postby John H » Tue Dec 29, 2020 3:01 pm

Sounds like a tedious job. If you get stuck, I have a Neway seat cutter set and also access to a valve grinder.
Good Luck.
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